Question

PROBLEMI A medication label and accompanying insert contain the following information: Pfizerpen® penicillin G potassium for injection twenty million units For intravenous infusion only After reconstitution, solution should be refrigerated. Discard unused solution after 7 days. 75 mL 250,000 units/mL 33 mL 500,000 units/mL 11.5 mL 1,000,000 units/mL 1. What is the expiration date and time if this medication is reconstituted on May 27 at 14152 2. If you add 75 mL of diluent to the vial, what volume will you draw up for a dose of 2.5 million units? 3. Can this medication be given by intramuscular injection? 4. If 11.5 mL of diluent is added to the vial, what volume will you draw up for a dose of 4 million units?

Answer 1

1) Given the medication will expire after 7 days of reconstitution so if reconstituted on wiN at at 2:15pm the expiration date and time will be on red June ( May has 31 days from May 27 to June 3 are seven days) and the time will be 2:15pm

2)Given

75ml =250000unit/ml

2.5 million units=2500000lakhs unit

when 1ml=250000units

Then ?=2500000

Cross multiply and divide

10ml to get a dose of 2.5 million units

3)The only route of administration is via intramuscular site choosing other route like IV can be life threatening

4)Given 11.5ml diluent is added ,the resulting solution is 1ml=1,000,000 units

so 4 million units=?

cross multiply and divide

4ml= 4 million units